ROME (AP) — Pope Gregory XIII, the 16th century pontiff responsible for the Gregorian calendar, now has another celestial claim to fame. Skip to content Mastodon Covering the world of religion.

It is a solar calendar based on a 365-day year, and makes a distinction between BC and AD, with the birth of Jesus Christ. Timekeeping gets more complicated than that, though, when we need to keep ...

The Gregorian calendar, as we know today, begins on January 1. "To avoid confusion, record-keepers used a system in which they would use two years for dates between January 1 and March 24.

Pope Gregory XIII (born Ugo Boncompagni in 1502) who introduced the “Gregorian” calendar in 1582. Until then, the Julian calendar had been in use since 45 BC.

However, the Julian calendar was approximately 11 minutes longer than the actual solar year, causing the date of Easter to drift gradually over the centuries. By the time of the Gregorian reform ...

In Ethiopia, the birth year of Jesus Christ is recognized as seven or eight years later than the Gregorian, or “Western” calendar, which was introduced by Pope Gregory XIII in 1582.

ROME (AP) — Pope Gregory XIII, the 16th century pontiff responsible for what is today known as the Gregorian calendar, now has another, celestial claim to fame. A working group of the ...